JPH0632202Y2 - Hinge for opening and closing the lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hinge for opening and closing a lid, which is suitable for use in opening and closing the lid of a centrifuge, for example.

(Prior art) In a centrifuge, a cylindrical container rotates at high speed inside a main body covered with a lid, so if you are not careful when opening and closing the lid, you may get caught and injured. It is in. Therefore, there is a demand for a hinge configured so that the lid is automatically opened only by releasing the lock device for the lid provided outside the main body.

At that time, since the hinge is usually configured to automatically open the lid body by utilizing the elastic force of the elastic member such as the spring, the lid body is pushed in the fully open position unless some brake means is provided, It will bounce up.

This is generally true of what is configured to automatically open the lid by unlocking the locking device, even if it is not a hinge for opening and closing the lid of the centrifuge.

Therefore, hinges with various brake devices have been developed, but all of the conventional ones use frictional force, and when closing the lid, you do not have to push down the lid against this frictional force. In addition to this, there is a problem that the frictional force is reduced due to long-term use, and a sufficient braking action cannot be performed.

(Problems to be solved by the invention) The purpose of this invention is to open and close the lid so that the lid can be closed smoothly without resistance and the braking action does not decrease even if it is used for many years. There is a hinge for use.

(Means for Solving the Problems) In order to achieve the above-described technical problems, the present invention proposes a support member for supporting a lid body and a mounting member attached to a main body side rotatably connected by a hinge pin to support the support member. A slider that is urged to rotate in the opening direction using a member and an elastic member, and one of the support member and the attachment member is urged to slide in one direction by the elastic member, and faces the slider. A cam portion is provided at a position where the slider is placed, and the slider comes into contact with the cam portion to perform a braking action.

This invention also provides a slider, which is biased to slide in one direction by an elastic member, between the support member and the mounting member,
A cam portion that abuts against the slider is provided on the opposite side of the supporting member and the mounting member, so that the supporting member is urged in the opening direction by one elastic member and the braking action is performed by the other elastic member at a certain opening angle or more. It is configured to run.

(Action) Since the slider is configured to be urged to slide in one direction by the elastic force of the elastic member and the cam portion that abuts on the slider, the braking action is performed, so that the braking can be performed smoothly. Even when the lid is closed, a large frictional force does not act, so you will not encounter a rubbing resistance.

In addition, it does not wear out even if it is used for many years, as compared with the case where it is simply caused by frictional force.

(Embodiment) The drawings show an embodiment of the present invention, in which 1 is a main body of a centrifuge, and 2 is a lid thereof. A lock device 3 is installed on one side of the main body 1. The locking device 3 includes a locking member 4 rotatably supported by an upper end of a main body 1 via a pin 5, a torsion coil spring 6 acting on the locking member 4, and a locking member. It is composed of an engaging plate 7 which is hung from the lid body 2 and whose engaging hole 7a is engaged by the engaging portion 4a of the member 4.

A mounting member 8 is fixed to the other side of the main body 1,
Both side plates 10a, 10a of a supporting member 10 are connected to the mounting member 8 via hinge pins 9, and the rear end of the lid 2 is fixed to the supporting member 10. The support member 10 includes an elastic member 1 in which a pair of sliders 11 and 11 are compression coil springs.
The sliders 11 and 11 are housed by being urged to slide in one direction by the sliders 2 and 12, and the protrusions 11a and 11a provided on the tops of the sliders 11 and 11 are accommodated.
A pair of cam portions 13, 13 having a curve that is farther from the axis of the hinge pin 9 as the lid 2 is closer to the lid 2 is provided at a position opposed to the raised portion 11a. , 1
It is in contact with 1a.

The mounting member 8 also accommodates a slider 15 which is biased to slide by an elastic member 14 composed of a compression coil spring, and faces a raised portion 15a provided on the slider 15 of the support member 10. At the position where the lid 2 is closed, there is provided a cam portion 16 having a curved line that is abruptly distant from the axial center of the hinge pin 9 from the predetermined position, and comes into contact with the raised portion 15a of the slider 15. ing.

Therefore, with the lid 2 closed, the support member 10
The ridges 11a, 11a of the sliders 11, 11 on the side are in contact with the starting ends 13a, 13a of the cams 13, 13 that are closest to the lid 2 side, and the elastic members 12, 12 are the supporting members 10. The lid body 2 is biased in the opening direction via the. On the other hand, the raised portion 15a of the slider 15 on the mounting member 8 side is located at the start end portion 16a of the cam portion 16 that is closest to the hinge pin.

Now, when the operating portion 4b beyond the fulcrum of the locking member 4 is pushed against the elastic force of the coil spring 6 and the locking portion 4a unlocks the engaging plate 7 from the engaging hole 7a, the lid is released. The body 2 is automatically opened by the elastic force of the elastic members 12, 12. At this time, the raised portions 11a, 11a of the sliders 11, 11 slide on the upper surface of the cam portion 13 to the trailing end portions 13b, 13b and engage with each other to prevent further lid opening of the lid body 2. At an opening angle just before the lid 2 is fully opened, the raised portion 15a of the slider 15 on the mounting member 8 side has the hinge pin 9 of the cam portion 16 provided on the support member 10.
When the slider 15 reaches the raised portion 16b raised in the direction further away and the slider 15 is slid downward against the elastic force of the elastic member 14, the rotation of the support member 10 is braked and the momentum thereof is repulsed. Therefore, the lid body 2 is not suddenly flipped up or hit.

Next, the lid body 2 is closed by pushing it down. At that time, the sliders 11 and 11 which bring the raised portions 11a and 11a into contact with the cam portions 13 and 13 have elastic forces of the elastic members 12 and 12, respectively. It encounters resistance because it can be slid against. Moreover, since the raised portion 15a of the slider 15 is in strong contact with the cam portion 16 by the elastic member 14 at the time of the initial operation, the resistance is large, but compared with the conventional brake mechanism using a friction member, It can be said that the resistance at the time of initial operation is small, because a large frictional force is not acting. Then, when the lid body 2 is closed, the engagement hole 7a of the engagement plate 7 is re-engaged with the engagement portion 4a of the engagement member 4, thereby maintaining the closed state.

As another embodiment, the elastic member for urging the support member 10 in the opening direction of the lid body 2 may be a torsion coil spring wound around the hinge pin 9. In this case, the sliders 11, 11 and the cam portion 13 could be omitted.

(Effect) Since the present invention is configured as described above, it is possible to prevent the lid from being pushed or flipped up when the lid is opened, and a large resistance may be encountered when closing the lid. In addition, the opening and closing operation can be smoothly performed, and the braking action is not weakened even after long-term use.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a partial sectional side view thereof, FIG. 2 is a plan view of a hinge portion, FIG. 3 is a rear view of the hinge portion, and FIG. 2 is a sectional view taken along the line AA of FIG. 2, and FIG. 5 is a sectional view taken along the line BB of FIG. 1 ... Main body, 2 ... Lid body 3 ... Lock device, 8 ... Mounting member 9 ... Hinge pin, 10 ... Support member 11, 11 ... Slider, 12, 12 ... Elastic member 13, 13 ... Cam, 14 …… Elastic member 15 …… Slider, 16 …… Cam

Claims (2)

[Scope of utility model registration request] 1. A support member for supporting a lid and an attachment member attached to a main body side are rotatably connected by a hinge pin,
An elastic member is used to urge the support member to rotate in the opening direction of the lid, and at least one of the support member and the attachment member is provided with a slider urged to slide in one direction by the elastic member. A hinge for opening and closing a lid, characterized in that a cam portion is provided at a position facing the slider, and the slider comes into contact with the cam portion to perform a braking action. 2. A slider which is urged to slide in one direction by an elastic member is provided between the support member and the mounting member, and a cam portion which contacts the slider is provided between the support member and the mounting member. A hinge for opening and closing a lid, wherein one elastic member is configured to urge the support member in the opening direction and the other elastic member performs a braking action at a certain opening angle or more.